We don't have synonyms for moggie yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are doggie, coggie and maggie.
(n) :
Alternative spelling of moggy (“a cat”). [(UK, Ireland, Commonwealth) A domestic cat, especially (depreciative or derogatory) a non-pedigree or unremarkable cat.]
(n) :
Alternative spelling of moggy (“a cat”). [(UK, Ireland, Commonwealth) A domestic cat, especially (depreciative or derogatory) a non-pedigree or unremarkable cat.]